{"id":104779,"date":"2026-08-12T12:06:18","date_gmt":"2026-08-12T10:06:18","guid":{"rendered":"https:\/\/sileu.com\/how-to-sterilize-a-menstrual-cup\/"},"modified":"2026-09-24T02:11:30","modified_gmt":"2026-09-24T00:11:30","slug":"how-to-sterilize-a-menstrual-cup","status":"publish","type":"post","link":"https:\/\/sileu.com\/en\/how-to-sterilize-a-menstrual-cup\/","title":{"rendered":"How to Sterilize a Menstrual Cup: Microwave, Pot or Tablets"},"content":{"rendered":"

Did you know you can sterilize your menstrual cup in just 3 minutes without watching a pan on the stove? Many users still boil their cup “by eye” in the same pot they cook with, when there are faster methods that are gentler on the silicone and perfect for traveling without a kitchen. Here are the three real methods \u2014microwave, pot and tablets<\/strong>\u2014 explained step by step, with exact times and no myths.<\/p>\n

Why you need to sterilize your menstrual cup (and when)<\/h2>\n

A menstrual cup doesn’t need sterilizing every time you empty it during the day: rinsing it with water and, if you have some, a little mild intimate soap is enough. Thorough sterilization<\/strong> is kept for two moments: the start and the end of each cycle. It’s a preventive hygiene step, not a daily obligation, and that’s also what manufacturers’ and health professionals’ usage guides say.<\/p>\n

Scientific evidence shows that a well-cared-for menstrual cup is a safe option: the systematic review and meta-analysis published in The Lancet Public Health (van Eijk et al., 2019)<\/a>, with 43 studies and more than 3,300 participants, concludes that the menstrual cup has an adequate safety profile and leakage rates equal to or lower than tampons and pads. That safety profile depends largely on proper hygiene: washing after each emptying and sterilizing between cycles.<\/p>\n

\"3
A quick comparison of the three methods for sterilizing your menstrual cup.<\/figcaption><\/figure>\n

Method 1: sterilizing the menstrual cup in the microwave<\/h2>\n

It’s the fastest method if you have a foldable sterilizer like the Sileu Clean<\/a> (\u20ac12.99) at home. Being made of medical-grade silicone, it withstands microwave heat perfectly without deforming. The process:<\/p>\n

    \n
  1. Fill the sterilizer with water until it covers the cup.<\/li>\n
  2. Put in the menstrual cup, already washed with water and mild soap.<\/li>\n
  3. Close the lid without pressing it all the way down (let the steam escape) and put the sterilizer in the microwave.<\/li>\n
  4. Heat for 3-5 minutes at medium power (600-800 W). The water should come to a boil inside the container.<\/li>\n
  5. Let it cool for a few minutes before taking the cup out: plastic and silicone hold heat.<\/li>\n<\/ol>\n

    Never put the cup in the microwave on its own, without water<\/strong>: the silicone can burn or degrade through direct contact with the metal of some turntables or through localized overheating. Always use a microwave-safe container with water in it, like the Sileu Clean sterilizer, designed precisely for this.<\/p>\n

    \n

    \ud83c\udf38 Sileu Clean foldable sterilizer \u2014 \u20ac12.99<\/strong><\/p>\n

    Medical-grade silicone, microwave-safe, and it folds flat to take up the space of a coin purse in your bag. Shipped from Spain in 24-72h.<\/p>\n

    See the Sileu Clean sterilizer \u2192<\/strong><\/a><\/p>\n<\/div>\n

    Method 2: sterilizing the menstrual cup by boiling it in a pot<\/h2>\n
    \"Boiling
    The classic method: boiling water, no cost, no special appliance.<\/figcaption><\/figure>\n

    It’s the cheapest method and doesn’t require buying anything. You need a pot you keep just for this (for hygiene, it’s better not to use your cooking pot on the same day) and enough water for the cup to be fully submerged without touching the bottom directly:<\/p>\n

      \n
    1. Fill the pot with enough water for the cup to float without touching the bottom (you can put it inside a metal strainer or a silicone egg holder).<\/li>\n
    2. Bring the water to a boil.<\/li>\n
    3. Put the cup in and let it boil for 5-10 minutes<\/strong> from when the water comes back to the boil.<\/li>\n
    4. Take it out with clean tongs, never with your fingers over the boiling water.<\/li>\n
    5. Let it air-dry on a clean cloth before storing it.<\/li>\n<\/ol>\n

      Watch out for two common mistakes: letting the cup touch the bottom of the pot directly (it can burn at the point of contact) and boiling it longer “just in case”. More than 10-15 minutes adds no extra hygiene and does speed up silicone wear in the long run.<\/p>\n

      Method 3: sterilizing the menstrual cup with tablets, no hot water<\/h2>\n

      When you have no access to a stove or microwave \u2014camping, on a night train, in a shared office bathroom\u2014 Milton sterilizing tablets<\/a> (\u20ac2.99) are the most practical alternative. They work by cold chemical disinfection:<\/p>\n

        \n
      1. Dissolve one Milton tablet in cold or lukewarm water (never hot: it would lose effectiveness), following the ratio on the pack.<\/li>\n
      2. Soak the cup, already washed, in the solution for 15 minutes<\/strong>.<\/li>\n
      3. Take the cup out and rinse it with clean water before using it again.<\/li>\n<\/ol>\n

        It’s the ideal method for traveling with your menstrual cup<\/a>, because a box of tablets takes up the same space as a blister pack of ordinary pills and doesn’t depend on finding a plug or an available kitchen.<\/p>\n

        \"Sileu
        The Sileu Clean sterilizer and Milton tablets: the two allies of your menstrual cup hygiene.<\/figcaption><\/figure>\n

        Comparison: which method to choose for your situation<\/h2>\n
        \n\n\n\n\n\n\n\n\n
        <\/th>\nMicrowave<\/th>\nPot<\/th>\nMilton tablets<\/th>\n<\/tr>\n<\/thead>\n
        Time<\/strong><\/td>\n3-5 min<\/td>\n5-10 min<\/td>\n15 min soaking<\/td>\n<\/tr>\n
        Cost<\/strong><\/td>\nSterilizer \u20ac12.99<\/td>\n\u20ac0 (just water)<\/td>\n\u20ac2.99 for the tablets<\/td>\n<\/tr>\n
        Best for<\/strong><\/td>\nHome, a quick routine<\/td>\nNo sterilizer to hand<\/td>\nTravel, no stove or microwave<\/td>\n<\/tr>\n
        You need<\/strong><\/td>\nMicrowave + sterilizer<\/td>\nStove + dedicated pot<\/td>\nJust cold or lukewarm water<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

        If we had to pick just one method for everyday use, it would be the microwave with the Sileu Clean<\/a>: it’s the fastest and uses the least energy and water. But carrying some Milton tablets in your travel bag too is the lightest backup solution there is. In fact, the Sileu Travel Pack<\/a> brings together the cup, the foldable sterilizer and a case in one pack for \u20ac29.99.<\/p>\n

        Common mistakes when sterilizing a menstrual cup<\/h2>\n

        After years of answering our customers’ questions, these are the mistakes we see most often:<\/p>\n